Printing-plate foundation.



W. S. WARNOGK, PRINTING PLATE FOUNDATION.

APPLICATION FILED SEPT. 3, 1907.

Patented Sept. 28, 190 9.

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WALLAGE S. WARND'CK, OF CHICAGO, ILLINQIS.

PRINTING-warn rounnn rron.

Specification of Letters Patent. Patented Sept. 28, 1909. Application filed September a, 1907. Serial No. 391,135.

To all whom it may concern: 4

Be it known that I, VVALLACE S. WAR- NOCK, citizen of the United States,residing at Chicago, in the county of Cook and State .of Illinois, haveinvented a certain new and showing the preferred embodiment thereof,

in which Figure 1 is a view of so much of a printing plate foundationconstructed in accordance with my invention as is necessary to render anunderstanding of the invention,

clear. Fig. 2 shows adjacent portions of two contiguous blocks inseparated relation. Fig. 3 is a view similar to Fig. 2 showing theblocks in locking relation.

Like parts are indicated by similar characters of reference throughoutthe different figures. j

The plate foundation'is formed of a number of separately constructedrelatively and bodily movable blocks 1, which may be grooved in anypreferred manner, these blocks being illustrated with diagonal grooves2, to which direction of grooving,

however, I do not wish to be limited. There is provided at twodiagonally opposite corners of each block, a pair of locking devices 8in the form of dowels,'these dowels projecting from vertical sides ofthe blocks. There are distributed alon the sides of the 1' blocks, anumber of dowe receiving apertures 4;, 90 located that when any apertureis in recelpt of a dowel, the grooves 2 in one of the blocks are inperfect alinement with the adjacent grooves 20f the other block. Inorder that the blocks may be snugly enshouldered and engages a'thrustingspring 5 adapted, when unopposed, to thrust the dowel outwardly, flushwith the external surface of the block 1, being inserted in a recess,the cup constituting a barrel for said, spring 5. Notonly may printersfurniture be permitted snugly to engage the blocks by reason of thedisappearing dowels, but said blocks may be moved readily pasteach'ot'her until they are position, whereupon the spring 5 will thrustthe dowel 3 into a dowel receiving aperture 4. It will be observed thatwhen the recesses 4 are in receipt of dowels 3, not only will thegrooves in the associate blocks be maintained in alinement, but that oneblock will be prevented from rising with reference to another.

It will be seen that I have. provided a. printing plate foundationformed of a num.- ber of blocks grooved to receive plate-clampingdevices, each block having all of its vertical sides provided withdowels and dowelreceiving recesses for maintaining grooves in one blockin alinement with grooves an adjacent block, each dowel being surroundedby a cup or barrel received intotheassociate block, ,each cup or barrelpermitting the dowel to recede therein and containing a spring forpressing the dowel outwardly.

I have not deemed it necessary to describe any of the clamping devicesand facilities as; these are nowwell known in the art.

I have shown herein the style of plateclamping mechanism and foundationblock disclosed in my application Serial No. 308,121, filed March 26,1906, in which cobrought into proper pending application I have madeclaims upon such plate clamping mechanism and foundation block. I havealso shown herein certain structural characteristics that are disclosedand claimed in my copending application Serial No. 231,362, filedNovember 4, 1904:.

The claims in the present case' 'are based upon 'the dowel pin and blockconstruction.

I use the term spring pressed dowels in the sense of dowels that areadapted "to be thrust outwardly by spring mechanism when the outermovement of said dowels is not resisted, but which dowels may readily bedepressed. I do not wish to be understood as limiting myself to theprecise location of the spring mechanism, as any-spring mechanismwhichwill normally thrust the dowels outwardly but permit the dowels acup 6 with its bottom to be thrust inwardly, I consider to comewithin-the scope of my invention and within the scope of the said term.

\Vhile I have herein shown and particularly described the preferredembodiment of my invention, I do not wish to be limited to the preciseconstruction shown, but,

Having thus described my invention, I claim as new and desire to secureby Letters- Patent the following 1. A printing plate foundation formedof a number of blocks grooved to receive plateclamping devices, eachblock having all of its vertical sides provided with dowels anddowel-receiving recesses for maintaining grooves in one block inalinement with grooves in anadjacent block, each dowel being surroundedby a cup or barrel received into the associate block, each cup or barrelpermitting the dowel to recede therein and containing a spring forpressing the dowel outwardly. 2. A printin of a number 0 blocks, eachblock having all of its vertical sides provided with dowels anddowel-receiving recesses, each dowel beplate foundation formedingsurrounded by a cup or barrel received int-(i the associate block, eachcup or'barrel permitting the dowel t0 recede therein and containing aspring for pressing the dowel outwardly.

In witness whereof, I hereunto subscribe my name this 31st day of AugustA. D., 1907.

\VALLACE S. VVARNOCK.

Witnesses:

L. G. STRoH, G. L. CBAGG.

